ASPEN AEROGELS INC (ASPN) Stock Institutional Trading Activity


ASPEN AEROGELS INC (ASPN) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include First Eagle U.S. Value, Renaissance Technologies LLC, and Ariel Appreciation Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2025Renaissance Technologies LLCSell-432,300246,900$1,718,424
Q3 2025First Eagle U.S. ValueBuy517,323517,323$3,600,568
Q2 2025Renaissance Technologies LLCSell-84,900679,200$4,020,864
Q1 2025Renaissance Technologies LLCSell-2,300764,100$4,882,599
Q4 2024Renaissance Technologies LLCBuy632,500766,400$9,104,832
Q3 2024Renaissance Technologies LLCSell-215,800133,900$3,707,691
Q2 2024Renaissance Technologies LLCBuy122,300349,700$8,340,345
Q2 2023Renaissance Technologies LLCBuy193,900227,400$1,794
Q1 2023Renaissance Technologies LLCSell-89,20033,500$250
Q4 2022Renaissance Technologies LLCSell-37,500122,700$1,447
Q3 2022Renaissance Technologies LLCBuy81,900160,200$1,477
Q2 2022Renaissance Technologies LLCBuy21,60078,300$774
Q1 2022Renaissance Technologies LLCBuy22,54956,700$1,955
Q4 2021Renaissance Technologies LLCSell-74,60034,151$1,700
Q3 2021Renaissance Technologies LLCSell-136,400108,751$5,004
Q2 2021Renaissance Technologies LLCSell-169,800245,151$7,335
Q1 2021Renaissance Technologies LLCSell-151,800414,951$8,440
Q4 2020Renaissance Technologies LLCSell-52,000566,751$9,459
Q3 2020Renaissance Technologies LLCSell-72,000618,751$6,775
Q2 2020Renaissance Technologies LLCBuy56,600690,751$4,545
Q1 2020Renaissance Technologies LLCBuy7,821634,151$3,894
Q4 2019Renaissance Technologies LLCBuy56,799626,330$4,860
Q3 2019Ariel Appreciation FundSell-235,486444,331$2,630
Q3 2019Renaissance Technologies LLCBuy35,200569,531$3,372
Q2 2019Ariel Appreciation FundSell-785,563679,817$4,847
Q2 2019Renaissance Technologies LLCSell-16,470534,331$3,810
Q1 2019Ariel Appreciation FundSell-360,9001,465,380$3,737
Q1 2019Renaissance Technologies LLCBuy44,300550,801$1,405
Q4 2018Ariel Appreciation FundSell-12,7091,826,280$3,890
Q4 2018Renaissance Technologies LLCBuy37,700506,501$1,079

Frequently asked questions about ASPN activity

  • Which institutional owners are buying ASPN?

    Institutional owners buying ASPN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ASPN activity?

    "Buy" means an investor increased their reported position in ASPN compared to the prior reporting period. This reflects growing exposure to ASPEN AEROGELS INC (ASPN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ASPN increasing?

    Institutional interest in ASPN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.